Burke: Crepis tectorum vs. Crepis capillaris

	Crepis tectorum	Crepis capillaris
	annual hawksbeard, narrow leaf hawksbeard, rooftop hawksbeard	smooth hawksbeard
Habit	Glabrous annual, 1-10 dm. tall, with milky juice.	Branched annual, 1-9 dm. tall, often covered with short, stiff, pointed yellow hairs throughout, with milky juice.
Leaves	Basal leaves petiolate, the blade lanceolate or oblanceolate, finely toothed to pinnately parted, up to 15 cm. long and 4 cm. wide; reduced cauline leaves sessile and auriculate, linear, often involute.	Basal leaves petiolate, the blade lanceolate to oblanceolate, with fine teeth to pinnatifid, 3-30 cm. long and 5-45 mm. wide; cauline leaves reduced upward, becoming sessile, narrowly lanceolate, clasping and auriculate.
Flowers	Heads several to numerous, 30-70 flowered; involucre 6-9 mm. high, its inner bracts 12-15, with fine hairs and sometimes with stalked glands as well, the outer bracts about one-third as long; corollas all ligulate, yellow.	Heads several or numerous, 20-60 flowered; involucre 5-8 mm. high, its inner bracts 8-16, white-woolly and often glandular-bristly with black hairs, becoming spongy-thickened on the back; outer bracts linear, less than half as long as the inner.
Fruits	Achenes 2.5-4.5 mm. long, dark reddish-brown, spindle-shaped, with 10 ribs.	Achenes tawny, 1.5-2.5 mm. long, tapered at both ends.

	Crepis tectorum	Crepis capillaris
Flowering time	June-August	May-November
Habitat	Roadsides, fields, ditches, wastelots, and other disturbed, open areas.	Roadsides, fields, ditches, wastelots, and other disturbed, open areas at low elevation.
Distribution	Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across the northern regions of the U.S. and Canada to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]	Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east across most of North America to the Atlantic Coast. [WildflowerSearch map] [BONAP county map]
Origin	Introduced from Europe	Introduced from Europe
Conservation status	Not of concern	Not of concern
Sibling taxa	C. acuminata, C. atribarba, C. bakeri, C. barbigera, C. capillaris, C. intermedia, C. modocensis, C. nicaeensis, C. occidentalis, C. runcinata, C. setosa	C. acuminata, C. atribarba, C. bakeri, C. barbigera, C. intermedia, C. modocensis, C. nicaeensis, C. occidentalis, C. runcinata, C. setosa, C. tectorum
Web links	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search	Local floras: BC, CA, OR, WA Local Web sites: CalFlora, CalPhotos, Flora NW, PNW Herbaria, Turner Photog. WildflowerSearch iNaturalist (observations) USDA Plants Database LBJ Wildflower Center SEINet Plants of the World Online Encyclopedia of Life Wikipedia Google Image Search

Crepis capillaris

annual hawksbeard, narrow leaf hawksbeard, rooftop hawksbeard

smooth hawksbeard

Habit

Glabrous annual, 1-10 dm. tall, with milky juice.

Branched annual, 1-9 dm. tall, often covered with short, stiff, pointed yellow hairs throughout, with milky juice.

Leaves

Basal leaves petiolate, the blade lanceolate or oblanceolate, finely toothed to pinnately parted, up to 15 cm. long and 4 cm. wide; reduced cauline leaves sessile and auriculate, linear, often involute.

Basal leaves petiolate, the blade lanceolate to oblanceolate, with fine teeth to pinnatifid, 3-30 cm. long and 5-45 mm. wide;

cauline leaves reduced upward, becoming sessile, narrowly lanceolate, clasping and auriculate.

Flowers

Heads several to numerous, 30-70 flowered;

involucre 6-9 mm. high, its inner bracts 12-15, with fine hairs and sometimes with stalked glands as well, the outer bracts about one-third as long;

corollas all ligulate, yellow.

Heads several or numerous, 20-60 flowered;

involucre 5-8 mm. high, its inner bracts 8-16, white-woolly and often glandular-bristly with black hairs, becoming spongy-thickened on the back; outer bracts linear, less than half as long as the inner.

Fruits

Achenes 2.5-4.5 mm. long, dark reddish-brown, spindle-shaped, with 10 ribs.

Achenes tawny, 1.5-2.5 mm. long, tapered at both ends.

Crepis tectorum

Crepis capillaris

Flowering time

June-August

May-November

Habitat

Roadsides, fields, ditches, wastelots, and other disturbed, open areas.

Roadsides, fields, ditches, wastelots, and other disturbed, open areas at low elevation.

Distribution

Occurring in scattered locations on both sides of the Cascades crest in Washington; Alaska to California, east across the northern regions of the U.S. and Canada to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Occurring chiefly west of the Cascades crest and east in the Columbia River Gorge in Washington; Alaska to California, east across most of North America to the Atlantic Coast.

[WildflowerSearch map]

[BONAP county map]

Origin

Introduced from Europe

Conservation status

Not of concern

Sibling taxa